Automobile whistle



H. P. Hur-FMAN AUTOMOBILE WHISTLE Filed March 24, 1924 Patented Dec. 16, 1924.

PATENT OFFICE.

HOWRAN P. HUFFMAN, OF GADSDEN, ALABAMA.

AUTOMOBILE WHISTLE.

Application filed March 24, 1924. Serial N0. 701,367.

To all whom t may concern.'

Be it known that I, HowimN P. HUFFMAN, a citizen of the United States, residing at Gadsden, in the county of Etowah and State of Alabama, have invented new and useful Improvements in Automobile Whistles, of which the following is a specification.

My invention relates to audible signals, and in particular to chime whistles for use in connection with the exhaust of an automobile.

The primary object is the provision of an improved and eilicie-nt chime whistle adapted for sounding by exhaust gases of an automobile, compo-sed of relatively few parts and durable. Other objects will, from the description, be apparent to those skilled in the art.

The invention is illustrated in the accompanying drawing, of which- Figure 1 is a longitudinal section through a whistle constructed in accordance with the invention;

Figure 2 is an elevation of the core;

Figure 3 is a section on line 3 3 of Figure 1;

Figure 4 is la 4section on line 4 4 of Figure 1; and

Figure 5 is a section on line 5 5 of Figure 1.

As shown, the details of the whistle comprise a bowl 10 of annular formation having a flared mouth 11, a reduced shoulder 12, and a further reduced externally threaded nipple 13 extending therefrom, which nipple is adapted to be secured over an extension from the exhaust pipe of an automobile (not shown).

The core of the whistle consists of a base in the form of a cylindrical plug 14 threaded into the nipple 13 from the mouth of the bowl and having a shoulder 15 seated in the reduced shoulder 12 of the bowl. The plug 14 has a closed internal en'd 16 and is provided with, preferably, three radial ports 17, 18 and 19 extending through the shoulder 15 and communicating with an annular recess formed in the shoulder 12 of the bowl 10. An annular flange 21 on the end 16 of the plug extends laterally over the recess 20 sufciently towards the wall of the bowl to form a relatively small annular blow aperture 22, and as the threaded end of the plug is open it will be obvious that the exhaust gases discharged through the ports 17, 18 and 19 into the recess 20 will be blown with considerable pressure through the aperture 22. The flange 21 is inclined on its under face in the direction of the blow aperture, to prevent any pocketing of gases beneath the Harige.

The core is provided with three chambers 23, 24 and 25, radially disposed with their inner walls composed of la metal blank bent in a substantial V-shape to form three sectors, 26, 27 and 28. These sectors, comprising the inner walls of the chambers, are soldered or otherwise suitably secured to one another along their meeting faces to form., in effect, a solid central unit. This chamber unit is rigidly mounted on the plug 14, and from a short distance within the bowl the outer edges of the chamber walls are cut away inwardly to a point within the periphery of the plug iiange 21.l At this point in the description, it is to be noted that the outer edges of the sectors do not extend beyond the periphery of flange 21, when assembled.

A plug 30 is secured to the end of the chamber walls, opposite from. that attached to the plug 14, and a thin tubular metal casing 31 is shrunk over the plug 30, extending the length of the whistle and terminating within the bowl at the point at which the outer edges of the chamber walls are cut away. This casing or shell 31 forms the outer wall of the chambers, and each chamber is formed of a different length, to produce the chime eiect, by means oi" laterally extending stop plates 32 in the chamber 23, and 33 in the chamber 24, the plug 30 closing the remaining chamber 25. These plates are sectorshaped and :may be secured in the walls of the respective chambers at the desired points requisite to the necessary pitch.

Between the plates 32 and 33, are hollow chambers 35 and 36, which have no function in the operation of the device, but give durability to the structure, and permit of a more ready cooling of theI parts.

I claim:

A whistle of the character described comprising a bowl adapted for connection with the exhaust of an automobile engine, means in said bowl for dividing and projecting a blast of exhaust gases from said engine, a

tubular plural chime chamber connected with said bowl, a closure for the outer end thereof7 and a core for said chamber formed of a plurality of different length metal i' blanks bent substantially V shaped in Crossv section to form sectors of a circle when assembled, means `for securing the meetmg faces of said sectors together, and all of said sectors that are shorter than the length of the chime chamber having integral outer l0 stop-plates thereon. In. testimony whereof I aflix my signature.

./HOWRAN P. HUFFMAN. 

